<%--
  Created by IntelliJ IDEA.
  User: AIR
  Date: 2018/3/22
  Time: 16:25
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.util.List" %>
<%@ page import="java.sql.ResultSet" %>
<%@ page import="edu.sctu.User" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <title></title>
</head>
<body>

<jsp:include page="header.jsp"/>



<%

  //    if( session.getAttribute("a") == null)
//        response.sendRedirect("login.jsp");

//    int a;
//
//    a = 10;
//    // out ,request
//
//    out.write("hello,world!");
//    out.write("<h1> hello </h1>");

%>


<style type="text/css">

  table {

    border-collapse: collapse;
  }

  td {

    border: 1px solid #000;
    padding: 10px;
  }
</style>

<table>
  <tr>
    <td>编号</td>
    <td>姓名</td>
    <td>密码</td>
    <td>操作1</td>
    <td>操作2</td>
  </tr>


  <%



    User chen = new User();
    chen.id = 10;


    List<User> userList = new ArrayList<>();

    // 3+1
    Connection connection = null;
    Statement statement = null;
    ResultSet resultSet = null;

    // t_users
    String sql = "select * from t_users";

    Class.forName("com.mysql.jdbc.Driver");

    connection = DriverManager.getConnection(
            "jdbc:mysql://localhost:3306/sctu_javaweb_2018",
            "root",
            "123456"
    );


    statement = connection.createStatement();

    resultSet = statement.executeQuery(sql);

    while(resultSet.next()){


      int id = resultSet.getInt(1);
      String username = resultSet.getString(2);
      String password = resultSet.getString(3);

      // 封装
      User user = new User();
      user.id = id;
      user.username = username;
      user.password = password;

      userList.add(user);
    }

    resultSet.close();
    statement.close();
    connection.close();

//        edu.sctu.User john = new edu.sctu.User();
//        john.id = 1;
//        john.username = "john";
//        john.password = "123";
//        userList.add(john);
//
//        edu.sctu.User chen = new edu.sctu.User();
//        chen.id = 2;
//        chen.username = "chen";
//        chen.password = "abcccc";
//        userList.add(chen);

    // 字符串和变量的连接操作
    // 221
    // 2个双引号
    // 2个+号
    // 1个变量

//        for (int i = 0; i < 10; i++) {
//
//            out.write("<tr><td>"+i+"</td><td>John</td><td>123</td></tr>");
//        }
    for (User user : userList) {

      out.write("<tr><td>" + user.id +
              "</td><td>" + user.username +
              "</td><td>" + user.password +
              "</td><td>" +
              "<a href='deleteUserHandler.jsp?id="
              +user.id+"'>删除</a></td>" +
              "<td><a href='updateUser.jsp?id="+user.id+"&username="+user.username+"&password="+user.password+"'>更新</a></td></tr>");
    }

  %>


</table>




<%@include file="footer.jsp"%>

</body>
</html>